function testUpdate()
{
//Arrange
$id = null;
$name = "Allen";
$phone = "4444";
$test_patron = new Patron($id, $name, $phone);
$new_phone = "6666666";
//Act
$test_patron->update($new_phone);
//Assert
$result = $test_patron->getPhone();
$this->assertEquals($new_phone, $result);
}
